Kovid - Does this mean that valid books showing errors is a new feature with .9.20? I am not trying to be sarcastic, just trying to figure out if books that are good everywhere else that now show an error in Calibre was done deliberately. because it sounds like now that malformed XHTML files can be viewed, good books show an error.

A book with malformed XHTML is not a good book. And I do not appreciate your tone. I'm done responding to you.

A book with malformed XHTML is not a good book. And I do not appreciate your tone. I'm done responding to you.

part of what I was trying to figure out was, why is Calibre the only thing out there detecting this malformed XHTML? Even for books that come from BN, it was showing this. You've got more experience dealing with epub format than I do, so it was a genuine question, that's all.